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Claude Opus 4.5

API ID claude-opus-4-5-20251101

claude-opus-4-5-20251101 is an Anthropic model, released November 2025. It has a 200,000-token context window and up to 64,000 output tokens. It takes image input and supports reasoning. Standard price: $5.00 input and $25.00 output per 1M tokens.

Status
Active
Released
November 2025
Shutdown
not before Nov 24, 2026
Replacement
—

claude-opus-4-5-20251101 is active. Anthropic says it won't be retired before November 24, 2026.

Benchmarks

Scores as each source published them
or

Comparing with Claude Opus 4.1 (2025-08-05), the previous model in this line. A score is compared only with the same benchmark from the same source, at the same setting where both have it. Full comparison: prices, limits, features

Arena

ArenaClaude Opus 4.5Claude Opus 4.1 (2025-08-05)ChangeRankDateSource
Text
Other settings
  • 1470 ±3 vs 1448 ±3
By category
  • Math 1472 rank 51 vs 1444 (+28) at high effort 32k (vs thinking 16k)
  • Creative writing 1469 rank 18 vs 1446 (+23) at high effort 32k (vs thinking 16k)
  • Instruction following 1484 rank 19 vs 1458 (+26) at high effort 32k (vs thinking 16k)
  • Hard prompts 1501 rank 34 vs 1480 (+21) at high effort 32k (vs thinking 16k)
  • Long prompts 1495 rank 21 vs 1485 (+10, within range) at high effort 32k (vs thinking 16k)
  • Multi-turn 1486 rank 28 vs 1471 (+15, within range) at high effort 32k (vs thinking 16k)
  • Expert 1503 rank 36 vs 1481 (+22, within range) at high effort 32k (vs thinking 16k)
1474 ±41450 ±3+2442 of 415
37,532 votes		Oct 13, 2026source
Text: Coding
Other settings
  • 1523 ±5 vs 1505 ±5
1531 ±71511 ±6+2020 of 410
7,808 votes		Oct 13, 2026source
WebDev
Other settings
  • 1469 ±7 vs 1390 ±11
1493 ±81390 ±11+10359 of 142
11,035 votes		Oct 13, 2026source
Search1187 ±61167 ±5+2029 of 42
65,047 votes		Oct 13, 2026source
Document1465 ±10not rated21 of 44
7,981 votes		Sep 13, 2026source

Rated as claude-opus-4-5-20251101-high-32k (high effort 32k); Claude Opus 4.1 (2025-08-05) as claude-opus-4-1-20250805-thinking-16k. Some were rated at different settings; ratings on one arena share one scale, so the difference still reads directly. Ratings come from people voting between two anonymous answers; Text, Search and Document are style-controlled, as on arena.ai. Data: Arena (arena.ai), CC BY 4.0.

Epoch AI

BenchmarkClaude Opus 4.5Claude Opus 4.1 (2025-08-05)ChangeSettingRunSource
FrontierMath Tier 44.9%2.4%+2.5 pts32kJun 11, 2026source
FrontierMath Tiers 1-334.4%12.6%+21.8 pts32kJun 11, 2026source
GPQA Diamond
Other settings
  • 85.5% vs 77.3% 16k
  • 80.7% vs 73.2%
86.0%77.3%+8.7 pts32k (vs 16k)Nov 24, 2025source
OTIS Mock AIME 2024-2025
Other settings
  • 81.7% vs 64.4% 16k
  • 48.1% vs 40.0%
86.1%68.9%+17.2 pts32k (vs 27k)Nov 24, 2025source
SimpleQA Verified45.7%not run32kAug 27, 2026source
SWE-bench Verified76.7%73.3%+3.4 ptsFeb 5, 2026source

Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.

On cloud platforms

All platform dates
PlatformPlatform IDStateShutdownTime leftReplacementSource
Amazon Bedrockanthropic.claude-opus-4-5-20251101-v1:0Activenot before Nov 24, 2026—source
Microsoft Foundryversion 1claude-opus-4-5ActiveNov 24, 202640 days—source

Read daily from each platform's own pages. The shutdown date and countdown on this page use Anthropic's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.

Aliases pointing here: claude-opus-4-5 (in place when tracking began (October 6, 2026))

Features

Compare models
FeatureValueSinceSource
Prompt cachingA prompt prefix you send again and again (system prompt, documents, tools) is cached, so later requests cost less and start faster.Supportedin place when tracking began (October 6, 2026)source
Batch APISend many requests as one job that runs in the background, usually finished within 24 hours, at a lower price than live requests.Supportedin place when tracking began (October 6, 2026)source
Image inputImages such as screenshots, photos and charts can go in the prompt for the model to read.Supportedin place when tracking began (October 6, 2026)source
Reasoning / thinkingThe model can work through a problem step by step before it answers: usually better answers to hard questions, at the cost of more tokens and time.Supported (thinking: extended; default effort: high)in place when tracking began (October 6, 2026)source
Context windowThe most the model can work with in one request, in tokens: your prompt, conversation history and files. A token is about three-quarters of an English word.200,000 tokensin place when tracking began (October 6, 2026)source
Max output tokensThe longest reply the model can write in one response, in tokens. A token is about three-quarters of an English word.64,000 tokensin place when tracking began (October 6, 2026)source

Not published by Anthropic: Structured outputs, Function calling, PDF input, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs.

Price history

USD per 1M tokens, standard tier
$0.00$10.00$20.00$30.00Oct 2026In $5.00Out $25.00Oct 1, 2026 to Oct 15, 2026: Input $5.00, Output $25.00
$0.00$10.00$20.00$30.00Oct 2026In $5.00Out $25.00Oct 1, 2026 to Oct 15, 2026: Input $5.00, Output $25.00

We started recording this model's prices on Oct 1, 2026. The history grows with each daily check.

Show as a table
FromTypePrice
Oct 1, 2026Input$5.00
Oct 1, 2026Output$25.00

Prices

USD per 1M tokens, every type and band, by tier
TypePrice $/1MIn effect
Standard
input$5.00
cached input$0.50
cache write (5 min)$6.25
cache write (1 hour)$10.00
output$25.00
Batch
input$2.50
output$12.50

Changelog

Changes we detected on Anthropic's pages

No changes recorded yet.

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Last checked · Sources: Anthropic models, Anthropic deprecations, Anthropic pricing, Anthropic model pages